CN107398590B

CN107398590B - Machine tool, in particular a pendulum saw

Info

Publication number: CN107398590B
Application number: CN201710356679.1A
Authority: CN
Inventors: M.韦巴赫; P.艾森曼
Original assignee: Festool GmbH
Current assignee: Festool GmbH
Priority date: 2016-05-20
Filing date: 2017-05-19
Publication date: 2020-06-16
Anticipated expiration: 2037-05-19
Also published as: CN107398590A; DK3246141T3; EP3246141A1; DE102016109375A1; EP3246141B1

Abstract

The invention relates to a power tool, in particular a pendulum saw, in particular a power tool (10), in particular a saw or pendulum saw, for the separate machining of workpieces, having a drive assembly (11) having a drive motor (12) and a tool holder (13) for a separating tool (14) that can be driven by the drive motor (12), a pendulum base (18) on which a pendulum part (17) for changing the relative position of the tool holder (13) for the separating tool (14) and of an abutment surface (16) provided for the abutment of the workpiece is pivotably mounted about a pendulum axis (S), and having a manually actuable actuating element (62) that is mounted by means of a spring assembly (65) such that it can be moved in a detent position (R) and an actuating element (61) that can be actuated manually and is mounted such that it can be moved with a detent movement degree of freedom at an actuating element holder (76) ).

Description

Machine tool, in particular a pendulum saw

Technical Field

The invention relates to a power tool, in particular a saw or a pendulum saw (kappaäge, sometimes referred to as a crosscut saw), for the separate machining of workpieces, having a drive assembly having a drive motor and a tool holder for a separating tool which can be driven by the drive motor, a pendulum base on which a pendulum element about a pendulum axis for changing the relative position of the tool holder for the separating tool and an abutment surface provided for abutment of the workpiece is pivotably mounted, and having a manually actuable actuating element which is mounted by means of a spring assembly in a detent position and is movable with a detent freedom of movement at an actuating element mounting for actuating the detent element from the detent position into a release position (L ö sestellung), which engages with at least one detent counter contour in the detent position and fixes the pendulum element in a rotationally fixed manner relative to the pendulum base and which engages with the at least one open counter contour in the release position and disengages from the open counter contour (bgit) relative to the pendulum base.

Background

Such a power tool in the form of an oscillating saw is described, for example, in DE 102006059751 a 1. The known power tool seeks an inherently comfortable actuating concept, in which the operator can hold the latch actuating element by hand in the latch release position, so that the operator can actuate the clamping element with the same hand in order to clamp the pivot element with respect to the pivot base.

However, in some cases this operation is not practical, especially when the spring assembly has a large force that the operator may say has to overcome.

Disclosure of Invention

It is therefore an object of the present invention to provide a power tool which can be operated more easily.

In order to solve this problem, it is proposed in a power tool of the type mentioned at the outset that the actuating element is mounted movably with a blocking (blockaier) degree of freedom of movement, which is different from the latching degree of freedom of movement, on the actuating element mount between a latching open position, in which the latching element is open with respect to adjustment into the latching position, and a latching blocking position, in which the latching element is blocked with respect to adjustment into the latching position.

The basic concept here is to be able to deactivate the latching of the latching mechanism to a certain extent by actuating the actuating element with the blocking freedom of movement. The actuating element, which is already suitable for actuating the latching mechanism, can at the same time be used to prevent or block the latching. The operator can also prevent the latch with the same operating element (with which the operator can cancel the latch). It is possible to avoid catching or actuating a blocking element for blocking the catch, which is different from the actuating element, for example a displacement element (Schiebers) or the like, which holds the catch element or the actuating element in a fixed position. The actuating element remains in the blocking position without the action of force by the operator.

The machine tool is expediently a mobile, yet stationary machine tool. It is particularly advantageous if the machine tool, although transportable, that is to say having a weight of less than 60-80kg, can be placed on a base for the operation of the saw. During the execution of the separating cut or the saw cut, the workpiece is expediently held stationary with respect to the machine tool.

For example, the use of a locking of an angled bearing (Gehrungslagers) with which the saw assembly or the drive assembly can be pivoted relative to a guide base, in particular a so-called saw table, is possible, wherein the angled bearing provides a locking of the saw assembly or the drive assembly relative to the guide base by one or more tilt adjustment angles (Schrägstellwinkeln).

The separating tool is preferably a saw blade or comprises a saw blade. However, the separating means can also comprise or be separating discs.

The drive motor is suitably an electric drive motor.

The drive motor is advantageously provided for rotationally driving the tool holder and thus the separating tool. It is also possible to provide a transmission between the drive motor and the tool holder, for example for a rotational speed change and/or in the form of an angle transmission (Winkelgetriebes) and/or for generating an oscillating movement of the separating tool.

In particular in a machine tool to be placed on a base in a stationary manner, the following measures are suitable:

it is advantageously provided that the pivoting base is designed as a machine base which can be placed on a base, for example as a machine bed. The swing member is swingably supported at the machine base. It is also possible to place the oscillating element on the machine base or the oscillating base. The pivot axis about which the pivot element is pivotably supported with respect to the machine base is preferably a vertical pivot axis in use.

The pivot element and/or the pivot base expediently provide a bearing surface and/or an abutment surface for the workpiece. The pivot base can, for example, increase the contact surface and/or the contact surface of the pivot element. Furthermore, it is advantageous if an abutment body which is fixed or fixable to the pivot base projects for abutment of the workpiece toward the pivot part, in particular an abutment section for the workpiece above or on the bearing surface of the pivot part.

Advantageously, the drive arrangement assembly is arranged, in use, above the oscillating base.

It is furthermore expedient if the pendulum part or the pendulum base provides a load-bearing base for the drive assembly.

Preferably, the drive assembly is held on a carrier which projects in front of the pivot element or the pivot base. A linear guide for the drive assembly can be provided on the carrier, for example. Preferably, the carrier can be tilted with respect to the swing base or with respect to the swing member.

Advantageously, the tool holder, in particular the drive mechanism assembly, as a whole can be pivoted about a transverse cut (Kapp) -pivot axis by means of a transverse cut pivot bearing toward and away from the bearing surface for the workpiece. The transverse pivot axis preferably extends horizontally during use of the power tool. The machine tool can be, for example, an oscillating saw.

In particular, when the machine tool is designed as a drag saw or pendulum drag saw (Kapp-Zug-Säge, sometimes referred to as a cross-cut drag saw), it is proposed that the drive assembly is supported linearly along a longitudinal axis with respect to the pendulum base at a linear guide for carrying out a longitudinal cut with the separating tool, which linear guide comprises, for example, at least one elongate (langesteckten) guide body, in particular a guide rod or a guide rod, which extends along the longitudinal axis.

Preferably, the drive assembly is pivotably supported about the pivot base about a pivot axis by means of a pivot bearing transversely to the pivot axis of the pivot part about the pivot base. This enables, for example, a bevel (Gehrungsschnitte) or bevel cut to be made into the workpiece.

The carrier for the drive assembly can be pivoted about a tilting pivot axis by means of a tilting adjustment bearing (Schrägstelllagers) about the pivot base or the pivot element, and a linear guide for the drive assembly is provided on the carrier.

A preferred concept provides that the latching movement freedom includes or is formed by a pendability of the actuating element about a pendulum axis, wherein the pendulum axis forms an unlocking pendulum axis. The designation unlocking the pivot axis should facilitate differentiation from other pivot axes in the description and the solution according to the invention. A simple pivoting movement of the actuating element is sufficient to adjust the engagement or disengagement of the latching element with the latching counter-contour. It should be noted, however, that a linear movability can also be provided for adjusting the disengagement of the latching element from the at least one latching counter contour. Finally, it is also possible in principle for the actuating element to be used to adjust the superimposed movability of the latching elements, i.e. linear and pivotable.

Several possibilities are also given with respect to the blocking freedom of movement. It can be provided that the freedom of movement prevention includes or is formed by the ability of the actuating element to pivot about a movement-prevention axis and/or the displaceability of the actuating element about a movement-prevention axis. The pivot axis is advantageously different from the pivot axis of the latch freedom of movement. The pivot axis is expediently also different from the axis of movement of the detent freedom of movement, wherein it is absolutely possible for the two axes to be identical, i.e. for the actuating element to pivot about the axis of movement of the detent freedom of movement for blocking purposes. It is also advantageous if the axis of displacement prevention differs from the pivot axis and/or the axis of displacement of the latching freedom of movement. In this case, it is also expedient for the actuating element to be mounted so as to be displaceable along the pivot axis of the latch movement freedom in order to prevent the latch from pivoting.

Preferably, the unlocking pivot axis and the blocking pivot axis are at an angle to one another, in particular approximately orthogonal. In this way, it can be provided, for example, that in the use position of the power tool, the unlocking pivot axis extends horizontally, whereas the blocking pivot axis is oriented vertically or approximately vertically, for example inclined to the vertical, for example at an angle of 0 to 20 °.

A variant of the invention can provide that the detent element is brought into engagement, for example displaced or pivoted, by the actuating element into the detent-blocking position, so that the detent element engages or is supported by the support contour and can thus no longer be brought into engagement by the spring assembly with the at least one detent counter contour. The support profile reacts against the spring assembly.

Preferably, it is provided that the actuating element holds the detent element in the detent blocking position, as in the example shown in the figures. The latching element is thus blocked directly or indirectly by latching of the actuating element relative to the at least one latching counter-contour.

The actuating element can be supported, for example, by means of a single support contour or at least one support contour in the vicinity of the detent element, which represents a suitable situation in terms of lever force (Verhältnisse). furthermore, it is possible to provide a support contour at the free end region of the spring assembly for the detent element.

A preferred embodiment provides that the actuating element is loaded and/or latched with a mobility of the latching freedom of movement into a first (vorrangig) mobility before the blocking freedom of movement. It is therefore provided that the actuating element can move itself and preferably with the latching freedom of movement, the blocking freedom of movement being secondary (nachrargig). By spring loading or latching, it can be said that the latching mobility is preferably adjusted. The receiving contour at the actuating element bearing can be used, for example, for the purposes described above. The receiving contour can, for example, exhibit a bearing receptacle for the shaft element. However, it is also possible, for example, to provide a step or other contour, which is responsible for the actuating element preferably having the degree of freedom of the latching movement. It is also advantageous if a spring arrangement is provided, for example, to ensure that the actuating element preferentially takes over the degree of freedom of the latching movement. The spring assembly can be a separate spring assembly from the spring assembly that actuates the catch element. However, the spring assembly is preferably a spring assembly which also acts on the latching element in the direction of the latching position.

In an advantageous embodiment of the invention, the actuating element bearing has at least one bearing receptacle in which a shaft element for the pivotability of the actuating element about the unlocking pivot axis is pivotably mounted. The shaft element can be moved out of the bearing receptacle in order to provide the blocking freedom of movement, for example by means of a pivoting movement or a displacement movement. For example, the bearing receptacle can be provided on the edge of a support contour on which the actuating element is supported in the blocking position. Both variants are possible in terms of kinematics, i.e. for example the shaft element is arranged on the actuating element and received in the bearing receptacle. However, it is also possible to arrange the bearing receptacle at the actuating element and to rotatably mount it at a stationary shaft element.

A preferred concept provides that the actuating element is loaded into the at least one bearing receptacle by a spring assembly, for example a spring assembly of the catch element or a spring assembly separate from the spring assembly of the catch element. The spring arrangement thereby advantageously ensures that the actuating element can be moved mechanically with a preference for the latching freedom of movement.

It is also advantageous if the actuating element is mounted on opposite sides of each other so as to be pivotable about the unlocking pivot axis by a pair formed by the shaft element and the bearing receptacle of the actuating element bearing. The shaft projection projects laterally, for example, in front of the actuating element and is supported in the support receptacle.

In principle, it is possible for the two aforementioned pairs of bearing receptacle and shaft element to permit the mobility of the actuating element with the blocking freedom of movement. For example, the shaft element can be pivoted or moved out of the bearing receptacle. However, a suitable embodiment provides that the actuating element is mounted on opposite sides of each other so as to be pivotable about the unlocking pivot axis by a pair of a shaft element and a bearing receptacle of the actuating element bearing, wherein the shaft element of only one pair of bearing receptacle and shaft element can be moved out of its bearing receptacle. The further pair of bearing receptacle and shaft element nevertheless effects a transverse or pivoting or displacement movement of the actuating element transverse to the unlocking pivot axis. That is to say the pair of bearing receptacle and shaft element suitably forms or comprises a pivot bearing for the pivot axis prevention already mentioned.

The actuating element is suitably or comprises an actuating lever or an actuating ram.

Preferably, the actuating element has a rod-shaped or rod-shaped design.

Advantageously, the actuating element is arranged at an arm projecting from the pivoting base or the pivoting part or both. The arm can be used, for example, as an operating lever for swinging the swinging member with respect to the swinging base portion. The arm preferably has a slit for the separation tool.

The spring assembly suitably comprises or is formed by a leaf spring or a plate-shaped spring element or a plate-shaped spring body.

The spring assembly expediently has the latching element in its entirety or forms the latching element. The spring assembly can be a simple, for example elastic body which can be latched to the at least one latching mating contour. It is also possible that the spring assembly comprises, for example, a helical spring or a coil spring. Furthermore, the latching element can be designed, for example, as a spring tongue, i.e. to some extent integrally including the spring assembly.

Preferably, the spring assembly loads the actuating element against the actuating element support.

An advantageous embodiment provides that at least one spring arm of the spring assembly loads the actuating element, for example its shaft element or bearing receptacle, for example in the direction of the actuating element bearing. It can thus be provided, for example, that the shaft element of the actuating element is actuated in the direction of the bearing receptacle of the actuating element bearing and/or is pressed into the bearing receptacle and/or is held in the bearing receptacle. The arrangement in which the spring arms are spaced apart from one another is preferably designed in particular as fork-shaped or as fork arms which respectively act on the shaft element and hold it in the respective bearing receptacle. The bearing receptacle is expediently arranged on an arm already explained, which extends in front of the pivot base or the pivot part.

The spring assembly expediently has a spring element or a spring body, in particular of the type with a punched-out part or a bent part, which acts on the actuating element with mutually opposite end regions, on the one hand in the direction of the actuating element support and on the other hand on the latching element or has the latching element at the end regions. For example, one or more spring arms are provided at the first-mentioned end region, which spring arms each press the shaft element into the bearing receptacle.

Suitable ergonomic operating concepts can look like, for example, the following:

it is advantageously provided that the actuating element is arranged on the side of or below a clamping actuating handle, for example a hand knob (hand knob), a locking lever (Knebel) or the like, of a clamping device for clamping the pivoting part relative to the pivoting base. The actuating element is designed, for example, in the form of a half-shell or half-sleeve and extends along a clamping arm or tensioning arm of the clamping mechanism. In particular, it is preferred that the clamping lever and the actuating element can be operated by hand. An advantageous concept provides that the grip actuating handle, for example a rotary ball handle, can be actuated by means of the muscle of the thumb (Handballen) or the inner hand, while the actuating section of the actuating element can be grasped by one or more fingers. In particular, it is advantageous if the actuating element can be pivoted toward the clamping actuating handle in order to adjust the latching element out of latching with the at least one latching mating contour.

A suitable embodiment provides that the at least one latching counter contour is arranged on the pivot base and the latching element or the actuating element or both are arranged on the pivot part. In this way, the at least one latching counter contour is arranged in a stationary manner on the pivot base, while a movable element of the latching mechanism or the actuating element is arranged on the movable pivot part. However, it is also conceivable, for example, for the latching element to be arranged on the pivot base and the latching mating contour to be arranged on the pivot part. Both cases are possible, in which case the actuating element is arranged at the pivot part or at the pivot base. In any case, it is advantageous if the movable components (latching element and actuating element) are arranged on the same structural component.

The latching element has or is formed by a latching contour which matches the at least one latching counter contour. This latching contour comprises, for example, at least one latching projection and the at least one latching counterpart contour comprises at least one latching receptacle, or conversely the at least one latching counterpart contour comprises at least one latching projection and the latching contour comprises at least one latching receptacle.

The at least one latching mating contour expediently forms part of an assembly of a plurality of latching mating contours for the latching elements, which are arranged in an arc about the pivot axis of the pivot element with respect to the pivot base. It can thus be said that the latching element can be pivoted about the pivot axis and that latching counter-contours are present in at least two angular positions.

A suitable concept provides that the clamping contour, for example the abutment region, likewise extends in an arc-shaped manner about a pivot axis about which the pivot element pivots relative to the pivot base. It is also expedient for the clamping contour of the clamping means to be arranged on an edge of the at least one latching counter contour (abseits) or on an edge of an assembly of a plurality of latching counter contours. The corresponding functional clamps and latches are thereby functionally and mechanically decoupled from one another.

Drawings

Embodiments of the invention are explained below with the aid of the figures. Wherein:

figure 1 shows a perspective oblique view of a machine tool in the configuration of a drag pendulum saw,

fig. 2 shows a sectional view through the pivot base and the pivot element of the power tool according to fig. 1 together with the latching means and the holding means in the latched position, for example along section line a-a in fig. 1,

fig. 3 shows a detail D1 corresponding to the sectional view of fig. 2, however with the latch mechanism in the disengaged position,

figure 4 shows a view of the machine tool from obliquely below,

fig. 5 shows detail D2 of fig. 4, with the actuating element in the latch-open position,

fig. 6 shows a detail according to fig. 5, however with the actuating element in the blocking position,

fig. 7 shows a sectional view through the actuating element bearing along sectional line B-B (i.e. in a substantially horizontal sectional plane), for example corresponding to section D3 in fig. 5, and

fig. 8 shows a further sectional view corresponding to the detail D3 in fig. 5, however, through the actuating element bearing along the sectional line C-C (i.e. in a substantially vertical sectional plane).

Detailed Description

The power tool 10 is designed, for example, as an oscillating saw. The drive assembly 11 of the power tool 10 comprises a drive motor 12, which drives a tool holder 13, at which a separating tool 14, for example a saw blade, can be detachably arranged, directly or via a transmission mechanism, which is not shown. The drive motor 12 is an electric drive motor, in particular a brushless drive motor.

The drive assembly 11 is arranged above a support surface 15 for supporting a workpiece W. The workpiece W can be placed on the support surface 15 and placed against the contact surface 16 in order to perform a separating cut by means of the separating tool 14.

The support surface 15 is provided on a pivot member 17 that is pivotable about a pivot axis S relative to a pivot base 18. The swing base 18 forms a machine base 20.

The angular position of the tool receptacle 13 and thus of the separating tool 14 relative to the contact surface 16 can be adjusted by pivoting the drive assembly 11 about the pivot axis S, so that a separating cut can be introduced into the workpiece W at different angles, in particular at different oblique angles (Gehrungswinkeln).

The drive assembly 11 is held on a carrier 21 which, in the use position, projects up in front of the pivoting part 17.

The carrier 21 is connected to the pivot element 17, a variant can be provided in which the carrier 21 is immovably connected to the pivot element 17, so that the separating tool 14 is oriented at a fixed angle, in particular orthogonally, to the contact surface 16 and the contact surface 15, however, a preferred embodiment provides that the carrier 21 is mounted at the pivot element 17 by means of a tilting pivot bearing 22 so as to be pivotable about a tilting adjustment axis (Schrägstellachse) S2, so that a tilting cut can also be introduced into the workpiece W.

The tilting pivot bearing 22 has, for example, a bearing part 23 arranged on the pivot part, in particular on the pivot part body 19 of the pivot part 17, and a bearing part 24 on the carrier 21, the bearing parts 23, 24 being connected to one another in a rotatable manner by means of a bearing shaft element (lagercahselement), not shown. The support parts 23, 24 can be fixed relative to each other, wherein only one handle 26 is shown from the fixing device 25. The carrier 21 can be fixed in a rotationally fixed manner about the tilting pivot axis S2 on the pivot element 17 by means of the handle 26. For this purpose, a bearing shaft element, which is not shown in the figures, is actuated along its longitudinal axis by the handle 26, for example, in order to clamp, lock or the like the bearing parts 23, 24 to one another. An adjustment transmission mechanism for adjusting the tilt adjustment position (not shown) of the tool holder 13 relative to the bearing surface 15, for example as explained in DE 102006059751 a1, can also be provided at the tilt pivot bearing 22.

For supplying the drive motor 12 with energy, the power tool 10 can have a coupling terminal for an energy store (not shown), for example a battery pack, and/or (as shown in the figures) a grid coupling terminal 27, for example a grid cable, for coupling to an electrical energy supply grid, for example 110V to 240V ac.

The drive mechanism assembly 11 can be mounted in a non-displaceable manner on the carrier 21. In the present case, however, a linear guide 30 for the drive mechanism assembly 11 is provided, which has a guide body 31, for example a guide rod, at which a slide 32 is mounted so as to be linearly displaceable along the longitudinal axis L. The carriage 32 has, for example, a guide receptacle 33, which is penetrated by the guide body 31. The drive mechanism assembly 11 can thus be adjusted along the longitudinal axis L, so that the power tool 10 performs the function of a jigsaw. The adjustment movement along the longitudinal axis L is illustrated in the drawing by the arrow SL.

In order to perform the transverse cutting function, the tool holder 13, in particular the drive assembly 11, is mounted on the carriage 32 so as to be pivotable about a transverse pivot axis S3 by means of a transverse pivot bearing 35. The separating tool 14 can thus be pivoted about a transverse pivot axis S3 away from the bearing surface 15 and thus away from the tool W or toward the bearing surface 15 and thus toward the workpiece W, as illustrated by the arrows K1, K2 in the figures. For this purpose, the operator suitably grasps the drive assembly 11 at a handle 28, at which a drive switch 29 is preferably also provided for switching the drive motor 12 on and off.

The drive assembly, when pivoted toward the bearing surface 15, passes between the guide bodies 31 through a plunge (taucht … durch), wherein the separating tool 14 can be plunged into the slot 36 at the pivot element 17.

If the machine tool 10 is placed on a planar base, the pivot axis S extends vertically, while the pivot axes S2 and S3 extend horizontally. The swing axes S, S2 and S3 are at right angles to each other.

The drive motor 12 is preferably received in a motor housing 37. For the separating tool 14, the drive assembly 11 preferably has an upper cover 38 and an adjustable cover 39, so that only the section of the separating tool 14 which normally sinks into the slit 36 and the section facing the carrier 21 are exposed.

A foot part 57 projects laterally in front of the machine base 20 or the oscillating base 18, the foot 58 of which foot part is provided for resting on a base. The foot part 57 expediently has a bearing surface 59 which lies in a plane with the bearing surface 15 of the pivot part 17. The foot part 57 is preferably fixedly connected to the pivot base 18, in particular is formed in one piece with the pivot base.

An abutment 44 is held on the foot part 57, which provides the abutment surface 16. The two abutments 44 extend as far as the flat side of the separating tool 14, i.e. also above the bearing surface 15 of the pivoting part 17. The contact body 44 is, for example, plate-shaped or formed from a plate.

The bearing surface 15 can be enlarged by a support bracket 40 arranged laterally at the pivot base 18 or the machine base 20. The support bracket 40 has, for example, a support foot 41 for placement on a base. The support bracket 40 is mounted so as to be displaceable relative to the pivot base 18 by means of a guide element 42. It is preferably provided that the support bracket 40 can be moved away from the pivot base 18 or the machine base 20. The support bracket 40 expediently has a bearing surface 43 which lies in a plane with the bearing surface 15 of the pivot element 17.

The actuating arm 46 projects radially outward in front of the base 45 of the pivot element 17, which is for example of a substantially flat cylindrical shape. The actuating arm 46 expediently has a bearing surface 47 which is connected to the bearing surface 15 provided at the pivot element base 45 and lies in the same plane. The slot 36 extends from the bearing surface 15 into the bearing surface 47. The actuating arm 46 is also supported on the base by a support 48. The support 48 is suitably adjustable and includes a corresponding adjustment threaded fastener 49.

The operator can grip the actuating arm 46 in order to pivot the pivoting part 17 and thus the drive mechanism assembly 11 together with the tool holder 13 about the pivot axis S, as is illustrated by the arrows K2 and K3.

The scale 34 on the pivot base 18 enables a corresponding adjustment or pivot angle of the pivot element 17 relative to the pivot base 18 to be read.

The pivoting part 17 and thus the drive assembly 11 can be fixed in different angular positions of rotation relative to the pivoting base 18 about the pivoting axis S, for which purpose, for example, a clamping mechanism 50 is provided. The clamping mechanism 50 includes a clamping operating handle 51, such as a rotary knob. The clamping lever 51 projects, for example, in front of the free end region of the arm body 52 of the actuating arm 46, so that an operator can easily grip the clamping lever 51 in order to pivot the pivoting part 17 about the pivoting base 18. Furthermore, the operator can grip the gripping handle 51, for example, with the inner hand surface thereof in a surrounding manner and thereby perform a rotary actuation, in order to adjust the gripping mechanism 50 between a gripping position, in which the pivoting member 17 is gripped about the pivoting base 18, and an open position, in which the pivoting member 17 can be adjusted about the pivoting axis S about the pivoting base 18.

For example, a rod-shaped clamping element 53 extending in the longitudinal direction of the actuating arm 46 projects with a free end region forward relative to a clamping contour 54 of the pivoting base 18. The clamping element 53 can be screwed into and out of a thread, which is fixed in position with respect to the actuating arm 46, for example, at a nut 55 (indicated by an arrow in fig. 3), wherein the clamping element 53 is adjusted along its longitudinal axis from the clamping position (shown in dashed lines in fig. 3) into the open position (shown in solid lines in fig. 3) and vice versa. In the clamping position, the free end of the clamping element 53, its end side, is clamped or pressed against the clamping contour 54, and in the open position is spaced apart from the clamping contour 54. The clamping element 53 is rotatably mounted in a bearing body 56 in the region of the clamping lever 51. The support body 56 has a columnar structure, for example. The support body 56 has a support receptacle through which the clamping element 53 passes.

An almost stepless rotational angle adjustment of the pivot element 17 relative to the pivot base 18 can be achieved with the clamping means 50. The latching mechanism 60 explained below proves to be quick and effective for rapid working operation, in which a predetermined rotational angular position of the pivot element 17 relative to the pivot base 18 or a predetermined rotational angular position of the separating tool 14/tool holder 13 relative to the contact surface 16 can be set.

The latching mechanism 60 comprises a latching element 61 which, by means of an actuating element 62, can be disengaged from a latching counter-contour 63 at the pivot base 18 and then assumes a disengaged position O (fig. 2, 4, 5) or engages one of the latching counter-contours 63, so that the pivot part 17 is latched and fixed in a rotationally fixed manner with respect to the pivot base 18. This position of the latching element 61 is the latching position R shown in fig. 3 and 6.

The latching counter contour 63 extends in an arc-shaped manner about the pivot axis S. The latching counter contour 63 comprises, for example, a latching deepening 64. The snap-fit counter contour 63 is arranged on the underside of the pivot base 18, i.e. on the underside of the machine base 20. The latching counter-contour 63 is arranged next to the clamping contour 54 and is separated from the clamping contour 54, so that latching and clamping do not interfere with one another or interfere with one another.

The detent element 61 is loaded into the detent position R by a spring assembly 65.

The spring assembly 65 comprises, for example, a spring element 66. The spring element 66 is, for example, substantially plate-shaped. The spring element 66 is fixed in a stationary manner on the actuating arm, for example by being screwed to the arm body 52 by means of a threaded connection (verschraumbung) via a threaded fastener 67. Of course, other types of fastening of the spring assembly 65 to the actuating arm 46, such as clamping, gluing or the like, can also be realized without difficulty.

The latching element 61 comprises, for example, a latching projection 68 which is arranged at an end region 69 of the spring assembly 65. This end region 69 comprises, for example, a step 70, in front of which the latching projection 68 projects in the direction of the latching counter-contour. An inclined surface 71 is preferably provided at the latching projection 68, so that it can be slid into the latching counter-contour 63 in a simpler manner. The catch element 61 comprises, for example, a catch body 72, in particular of the type with a synthetic material cover or synthetic material. The spring assembly 65, in particular the spring element 66, is preferably made of spring steel or other elastically yielding (nachgieben) metal. The latching body 72 is, for example, glued, screwed or otherwise fixedly connected to the end region 69 of the spring assembly 65.

The end region 69 of the spring assembly 65 is designed in the manner of a spring tongue. For example, an arm 74 extends between a fastening section 73 of the spring assembly 65, through which the threaded fastener 67 passes, and the end region 69. The arms 74 have a greater distance in the region of the threaded fastening 67 than in the region of the latching elements 61 or the end regions 69, i.e. they end away from one another toward the end regions 69 (laufen … zu). At the fixing section 73, the two arms 74 are connected to each other by a connecting section 75.

The actuating element 62 is mounted pivotably about an unlocking pivot axis ER, i.e., with a latching freedom of movement, about the actuating arm 46 and thus about the pivot part 17 by means of an actuating element bearing 76 in order to adjust the latching element 61 from the latching position R into the release position O. Furthermore, the actuating element 62 can be pivoted transversely to the unlocking pivot axis ER and thus with a blocking freedom of movement about the blocking pivot axis BS at the actuating element bearing 76 into a blocking position RB in order to block the latching element 61 in the release position O, i.e. to block latching relative to one of the latching counter-profiles 63. In contrast, in the latch open position RF, the actuating element 62 can be pivoted freely about the unlocking pivot axis ER, wherein the latch element 61 can be adjusted from the release position O into the latch position R.

The actuating element 62 is designed as an actuating lever, which is mounted with its mounting section 77 so as to be pivotable about the pivot axes ER and BS on the actuating element mounting 76. The grip section 78 at an end region of the actuating element 62 is arranged in the vicinity of the clamping actuating handle 51, i.e. the fingers of a hand which can be gripped by the hand of an operator, for example supported with the inner hand at the clamping actuating handle 51. Furthermore, at the gripping section 78, a seat projection 80 is provided, forming a kind of gripping cavity. The abutment projection 80 projects laterally in front of the gripping section 78, so that the operator can apply a pulling force to the actuating element 62 in an oblique direction toward the clamping actuating handle 51.

This supports, in particular, the release of the latching mechanism, i.e. the adjustment of the actuating element 62 from the latching position R into the release position O.

An actuating section 79 for actuating the latching element 61 is provided at a further end region of the actuating element 62.

The actuating lever or the actuating element 62 is held at the actuating arm 46 by the spring assembly 65. The actuating element 62 is arranged in a sandwich-like manner between the arm body 81 of the actuating arm 46 and the spring assembly 65 on the other hand. The actuating lever or the actuating element 62 extends, for example, between the threaded fasteners 67.

The actuating section 79 is supported at the end region 69 of the spring element 66. By pivoting the actuating element 62 about the unlocking pivot axis ES, the actuating section 79 can adjust the end region 69 together with the latching element 61 out of the latching counter contour 63, i.e. out of the release position O. In this case, the gripping section 78 is pivoted toward the clamping lever 51. This operation is particularly ergonomically comfortable.

The spring assembly 65 also serves as a return spring which adjusts the actuating element 62 back from the release position O in the direction of the latching position R, since the end region 69 of the spring assembly acts on an actuating section 79 of the actuating element 62.

In the disengaged position O, an arbitrary rotational angular position of the swing member 17 with respect to the swing base 18 can be adjusted. By means of the clamping mechanisms 50, the rotational angle positions can be fixed, respectively. In order to adjust any desired rotational angle position of the pivot element 17 relative to the pivot base 18, the operator himself can hold the actuating element 62 in a fixed position (sometimes referred to as a catch) in which the latching element 61 is held in the release position O. However, this operation is not comfortable in all situations. The actuating element 62 can thus advantageously be adjusted into the blocking position RB, in which it holds the blocking element 61 in the release position O without the action of force by the operator.

In the blocking position RB (which can be reached by adjusting the actuating element 62 about the pivot axis BS in the direction of the arrows B1, B2 drawn by way of example in fig. 5), the actuating section 79 of the actuating element 62 is supported on the support contour 82 of the actuating arm 46. The support contour 82 is preferably fixedly connected to the arm 81, for example, formed integrally with the arm.

It should be mentioned here that the arm 81 is expediently designed as a cast part, so that it can expediently have corresponding ribs (verippungen) which reinforce it. The pendulum base 18 and/or the pendulum part 17 and/or the carrier 21 are preferably also embodied as cast parts and/or advantageously have reinforcing profiles, ribs or the like, which are at least partially visible in the drawing (for example in fig. 4). The pendulum base 18 and/or the pendulum part 17 and/or the carrier 21 are expediently made completely or partially of metal, in particular of aluminum and/or magnesium or similar materials. Of course, manufacture from synthetic materials in whole or in part may also be achieved. The actuating element 62 is particularly preferably made of a synthetic material, which makes it particularly lightweight. However, the actuating element 62 can also be made entirely or partially of metal. The measures described above are of course considered advantageous in every power tool according to the invention, not only in the power tool 10.

A recess 83 is provided on the edge of the support contour 82, in which recess the actuating section 79 of the actuating element 62 is received in the latching open position RF. This deepening 83, although it allows a certain play of the actuating element 62 about the blocking pivot axis BS, does not allow adjustment into the blocking position RB.

The bearing concept of the actuating element bearing 76 also functions in the sense that the actuating element 62 can be pivoted preferentially about the unlocking pivot axis ER and secondarily about the blocking pivot axis BS. Extending from the actuating element 62 are

shaft elements

84, 86 which are received in bearing

receptacles

85, 87 of the actuating element bearing 76.

The

shaft elements

84, 86 extend, for example, along the unlocking pivot axis ER and/or transversely to the longitudinal extent of the actuating element 62.

By means of the spring assembly 65, the

shaft elements

86, 84 can be held in the bearing

receptacles

85, 87 both in a rotatable manner about an axis (for example the unlocking pivot axis ER) and transversely to this single axis with a certain play of movement. The

shaft elements

84, 86 are held in the bearing

receptacles

85, 87 by spring arms 88 of the spring element 66. The spring arms 88 are supported at ribs 90 or other relatively narrow support projections of the

shaft elements

86, 84.

The shaft element 84 is received in the bearing receptacle 85 so as to be pivotable about the pivot axis BS. For this purpose, the head region 91 of the shaft element 84 is, for example, round, so that the shaft element 84 can be rotated at the bottom of the bearing receptacle 85. Furthermore, the shaft element 84 has a spherical or ball-shaped design, so that the shaft element 84 can be rotated in the bearing receptacle 85 about the unlocking pivot axis ER and the blocking pivot axis BS. I.e. the axis of oscillation blocking BS extends through the bearing receptacle 85.

The distance between the side legs 92 of the bearing receptacles 85 for the shaft elements 84 is dimensioned such that, although the shaft elements 84 can pivot in the bearing receptacles 85 about the pivot axis BS, there is no or almost no play in the bearing receptacles 85 in the sense of a linear or translational movement, but only a rotational play or essentially only a rotational play.

Instead, the shaft element 86 is received with a movement play in a bearing receptacle 87 of the shaft element 86. The distance between the side legs 93 of the bearing receptacle 87 is correspondingly wide, so that the shaft element 86 can pivot about the pivot axis BS of the other pivot bearing formed by the shaft element 84 and the bearing receptacle 85.

It is advantageously provided that the head region 94 of the shaft element 86 can be supported at a support surface 95 at the bottom of the bearing receptacle 87. This support surface 95 supports the actuating element 62 in such a way that the shaft element 84 is held in the bearing receptacle 85.

Advantageously, a bearing deepening 96 is provided in the bearing receptacle 87, in which the shaft element 86 is received for pivoting about the unlocking pivot axis ER. A support contour 89 is provided next to the bearing receptacle 87, in which the shaft element 86 is supported in the blocking position RB.

The spring arm 88 that acts on the shaft element 86 retains the shaft element 86 in the bearing deepening 96 in the normal latching unlocking function of the actuating element 62. In order to assume the blocking position RB, the actuating element 62 must be moved out of the bearing recess 96 against the force of the spring arm 88 which acts on the shaft element 86 and is displaced onto the support contour 89. This ensures that the actuating element 62 is preferentially pivoted about the unlocking pivot axis R and, as it were, does not unintentionally realize a mobility about the blocking pivot axis BS. Furthermore, the two

support contours

82, 89 can jointly achieve a retention of the actuating element 62 in the detent blocking position RB.

Claims

1. A machine tool (10) for machining workpieces in a separate manner, having a drive assembly (11) having a drive motor (12) and a tool holder (13) for a separating tool (14) which can be driven by the drive motor (12), a pivot base (18) on which a pivot part (17) for changing the relative position of the tool holder (13) for the separating tool (14) and an abutment surface (16) provided for the abutment of the workpieces is pivotably mounted about a pivot axis (S), and having a catch element (61) which is loaded into a catch position (R) by means of a spring assembly (65) and is manually actuable, is mounted so as to be movable with a catch movement degree of freedom at an actuating element mounting (76) for actuating the catch element (61) from the catch position (R) into a release position (O) ) An actuating element (62) which, in a latching position (R), engages with at least one latching counter-contour (63) and fixes the pivot element (17) in a rotationally fixed manner relative to the pivot base (18) and, in a release position (O), disengages from the at least one latching counter-contour (63) and releases the pivoting of the pivot element (17) relative to the pivot base (18), characterized in that the actuating element (62) is mounted movably at the actuating element bearing (76) between a latching open position (RF), in which the latching element (61) is released relative to an adjustment into the latching position (R), and a latching blocking position (RB), in which the latching element (61) is blocked relative to the latching position (R), with a blocking degree of freedom of movement which is different from the latching degree of freedom of movement And (6) adjusting.

2. The power tool (10) as claimed in claim 1, characterized in that the latching freedom of movement comprises or is formed by the ability of the actuating element (62) to pivot about a pivot axis forming the unlocking pivot axis (ER).

3. Machine tool according to claim 1 or 2, wherein the freedom of movement prevention comprises or is formed by the ability of the actuating element (62) to pivot about a movement-prevention axis (BS) and/or the ability of the actuating element (62) to be displaced about a movement-prevention axis.

4. The machine tool according to claim 1 or 2, characterized in that the actuating element (62) and/or the latching element (61) is supported in the latching prevention position (RB) on at least one support contour (82, 89), and/or the actuating element (62) holds the latching element (61) in the latching prevention position (RB).

5. Machine tool according to claim 4, characterized in that the at least one support contour (82, 89) comprises or is formed by a support contour (89) at the actuating element bearing (76) and/or a support contour (82) directly at the latching element (61) and/or a support contour (82) at a free end region of a spring assembly (65) for the latching element (61).

6. The power tool according to claim 1 or 2, characterized in that the actuating element (62) is loaded and/or latched with the latching freedom of movement into a movement which is preferred before the blocking freedom of movement.

7. The machine tool according to claim 1 or 2, wherein the actuating element support (76) has at least one support receptacle (85, 87) in which a shaft element (84, 86) for the pivotable movement of the actuating element (62) about the unlocking pivot axis (ER) is pivotably mounted, wherein the shaft element (84, 86) can be moved out of the support receptacle (85, 87) in order to provide the blocking freedom of movement.

8. The machine tool according to claim 7, characterized in that the actuating element (62) is loaded into the at least one bearing receptacle (85, 87) by means of a spring assembly (65), and/or the actuating element (62) is mounted on opposite sides thereof so as to be pivotable about the unlocking pivot axis (ER) by a pair of a shaft element (84, 86) of the actuating element bearing (76) and the bearing receptacle (85, 87).

9. The machine tool (10) according to claim 1 or 2, characterized in that the actuating element (62) is or has an actuating lever or an actuating ram, and/or in that the actuating element (62) has a rod-shaped or rod-shaped design, and/or in that the actuating element (62) is arranged on an arm (46) projecting from the pivot base (18) and/or from the pivot part (17).

10. The machine tool according to claim 1 or 2, characterized in that the spring assembly (65) has or forms the detent element (61) in its entirety, and/or in that the spring assembly (65) loads the actuating element (62) against the actuating element support (76) and/or has a spring body or spring element (66), at one end region of which the detent element (61) is arranged or formed and at the other end region of which at least one spring arm is provided, which loads the actuating element (62) against the actuating element support (76).

11. The machine tool according to claim 1 or 2, wherein the actuating element (62) is arranged on the side of or below a clamping actuating handle (51), a clamping device (50) for clamping the pivoting part (17) relative to the pivoting base (18).

12. The machine tool according to claim 1 or 2, wherein the at least one latching counter contour (63) is arranged on the pivot base (18) and the latching element (61) and/or the actuating element (62) is arranged on the pivot part (17).

13. The machine tool according to claim 1 or 2, wherein the at least one latching counter contour (63) forms part of an assembly for a plurality of latching counter contours (63) of the latching element (61) arranged in an arc about the pivot axis (S) of the pivot element (17) with respect to the pivot base (18).

14. The machine tool according to claim 1 or 2, characterized in that the pivot base (18) is designed as a machine base which can be placed on a base, on or at which the pivot element (17) is pivotably mounted, and/or in that the pivot element (17) and/or the pivot base (18) provide a contact surface (16) and/or a contact surface (15) for the workpiece and/or a support base for the drive assembly (11).

15. Machine tool according to claim 1 or 2, characterised in that the drive assembly (11) is mounted linearly with respect to the pivot base (18) at a linear guide (30) for carrying out longitudinal cuts with the separating tool (14) and/or is mounted pivotably about an oblique pivot axis (S3) orthogonally transversely to the pivot axis (S) of the pivot part (17) with respect to the pivot base (18) and/or is mounted pivotably by means of a transverse pivot bearing (35) toward and away from the workpiece support surface (15).

16. The machine tool according to claim 1, wherein the machine tool (10) is a saw.

17. The machine tool of claim 16 wherein said saw is an oscillating saw.

18. The machine tool according to claim 3, wherein the pivot axis (BS) is different from the pivot axis (ER) of the latching freedom of movement.

19. The machine tool of claim 3 wherein said axis of resistance to movement is different from the axis of movement of said latch freedom of movement.

20. Machine tool according to claim 4, characterized in that the support contour (82, 89) is a support projection or a step.

21. Machine tool according to claim 5, characterised in that the support contour (89) is located next to the bearing deepening (96).

22. The power tool according to claim 6, characterized in that the actuating element (62) is loaded and/or latched with the latching freedom of movement into a movement which is preferred before the blocking freedom of movement by means of a receiving contour at the actuating element bearing (76) and/or by means of a spring assembly (65).

23. The power tool as claimed in claim 22, characterized in that the spring assembly (65) is a spring assembly (65) of the catch element (61).

24. Machine tool according to claim 7, characterised in that the shaft element (84, 86) can be moved out of the bearing receptacle (85, 87) by a pivoting movement in order to provide the freedom of movement.

25. The power tool as claimed in claim 8, characterized in that the spring assembly (65) is a spring assembly (65) of the catch element (61).

26. Machine tool according to claim 9, characterised in that the arm (46) has a slot for the separating tool (14).

27. The machine tool according to claim 11, wherein said gripping handle (51) is a manual knob.

28. The machine tool according to claim 11, wherein the clamping lever (51) and the actuating element (62) can be operated by hand.

29. Machine tool according to claim 8, characterised in that only one pair of a bearing receptacle (87) and a shaft element (86) of the shaft element (86) can be moved out of its bearing receptacle (87), and/or in that the pair of the bearing receptacle (85) and the shaft element (84) forms a pivot bearing for pivoting of the actuating element (62) about the pivot axis (BS) of the pivot freedom.